Evaluation of bond strength of orthodontic brackets without enamel etching

Boruziniat, Alireza; Khazaei, Yeganeh; Motaghi, Shiva; Moghaddas, Mohmmadjavad

doi:10.4317/jced.52253

Cited by 10 publications

(9 citation statements)

References 26 publications

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“…Due to higher shear bond strength in anchor-pylon base brackets and more destructive bond failure mode in this group, greater increase in enamel crack numbers after debonding was anticipated. 28 , 29 Contrary to our prediction, the results demonstrated that enamel crack numbers increased to a greater degree in the anchor-pylon group but this increase was not statistically significant. This might be attributed to the existence of primary cracks before bonding that can serve as stress accumulation regions and may influence developing of new cracks as a confounding factor in both groups.…”

Section: Discussioncontrasting

confidence: 99%

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Variations in enamel damage after debonding of two different bracket base designs: An in vitro study

Atashi¹,

Haghighi²,

Nastarin³

et al. 2018

J Dent Res Dent Clin Dent Prospects

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Background. Bracket base design is a factor influencing shear bond strength. High shear bond strength leads to enamel crack formation during debonding. The aim of this study was to compare enamel damage variations, including the number and length of enamel cracks after debonding of two different base designs. Methods. Eighty-eight extracted human premolars were randomly divided into2 groups (n=44). The teeth in each group were bonded by two types of brackets with different base designs: 80-gauge mesh design versus anchor pylon design with pylons for adhesive retention. The number and length of enamel cracks before bonding and after debonding were evaluated under an optical stereomicroscope ×40 in both groups. Mann-Whitney U test was used to compare the number of cracks between the two groups. ANCOVA was used for comparison of crack lengths after and before debonding in each group and between the two groups. Results. There was a significant increase in enamel crack length and numbers in each group after debonding. There was no significant difference in enamel crack numbers after debonding between the two groups, whereas the length of enamel cracks was significantly greater in anchor pylon base design after debonding. Conclusion. Bracket bases with pylon design for adhesive retention caused more iatrogenic debonding damage to enamel surface.

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Section: Discussioncontrasting

confidence: 99%

“…These factors could influence enamel surface stress reception and damage, which partly confirms longer enamel cracks in the anchor-pylon base bracket group afterdebonding. 28 , 29 …”

Section: Discussionmentioning

confidence: 99%

Variations in enamel damage after debonding of two different bracket base designs: An in vitro study

Atashi¹,

Haghighi²,

Nastarin³

et al. 2018

J Dent Res Dent Clin Dent Prospects

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“…The nanofiller in SBU and the formed thick adhesive layer might induce a beneficial effect in terms of bond strength, via stress relief and cessation of crack propagation, respectively 16 . This positive effect has been demonstrated for filled adhesives in bracket bonding 23 . Less but adequate SBS of self-etch adhesives compared with conventional etching has previously been reported 1 …”

Section: Discussionmentioning

confidence: 91%

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Shafıei

Sardarian

Fekrazad

et al. 2019

Dental Press J. Orthod.

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Objective: The aim of this study was to compare the effects of three enamel etching modes - laser-etch, self-etch and acid-etch (5, 10 and 15 s) - on bracket bonding, using a universal adhesive. Methods: Eighty-four maxillary premolars were randomly divided into seven groups (n=12) based on the etching method and the adhesive used for bracket bonding. After water storage and thermocycling, shear bond strength was measured, and adhesive remnant index scores on debonded enamel were determined. Results: There were significant differences between the seven groups regarding bond strength values (p< 0.001). The highest values were observed in universal adhesive with laser etching group, while Transbond XT with acid or laser etching, and universal adhesive used in self-etch mode demonstrated the lowest bond strength. The universal adhesive with the three different etching times presented with statistically similar results, all showing an improvement in bond strength, compared with Scotchbond universal (SBU)/SE. Conclusions: The universal adhesive evaluated in the present study demonstrated statistically similar bond strengths to conventional orthodontic adhesive in self-etch mode. The bond strength can be improved by adding an initial acid etching or laser conditioning step, although enamel damage was observed in some cases.

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“…To calculate the sample size, the software G * Power 3.0.10 (Franz Faul, Universität Kiel, Germany) was used. Based on a similar study [14], an α error � 0.05 and test power of 80% were considered so that 26 specimens per group would be required to detect possible differences, totaling 130 specimens. Bovine incisors [15] free of enamel defects were stored for 1 month in a 0.1% thymol solution to control bacterial growth [16].…”

Section: Sample Calculationmentioning

confidence: 99%

Shear Strength of Brackets Bonded with Universal Adhesive Containing 10-MDP after 20,000 Thermal Cycles

Proença¹,

Silva

et al. 2020

International Journal of Dentistry

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Objectives. e aim of this study was to evaluate the shear bond strength of metal brackets bonded with different universal adhesive systems containing 10-MDP and Transbond Plus Self Etching Primer after 20,000 thermal cycles. Materials and Methods. A total of 130 sound bovine teeth were used, which are divided into 5 groups (n = 26) according to the adhesive system used: All-Bond Universal (Bisco), Ambar Universal (FGM), Clearfil Universal Bond (Kuraray), Single Bond Universal (3M/ESPE), and Transbond Plus SEP (3M/ESPE) as control. e adhesives were applied for 20 seconds and bonded with a resin Transbond XT (3M/ESPE). After this, the teeth were submitted to 20,000 cycles at 5°C and 55°C. Afterwards, the shear bond strength test was performed in a universal test machine (Instron 3342). e adhesive remnant index (ARI) was evaluated under a stereomicroscope at 10x magnification and scanning electronic microscopy (SEM, Hitachi 3030). e shear bond strength data were submitted to One-Way ANOVA (α = 0.05) and the ARI to the Kruskal-Wallis test (α = 0.05). Results. Statistical analysis showed that the universal adhesive systems presented mean shear bond strength values similar to Transbond Plus SEP (p < 0.05). e universal adhesive presented similar ARI values among them but differed from those of Transbond Plus SEP (p < 0.001). Transbond Plus SEP presented a high ARI value when compared with the universal adhesive systems and high demineralization of enamel.Conclusions. e results show that universal adhesive systems may be used for bonding metal brackets if the orthodontist wants to maintain dental enamel health.

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Evaluation of bond strength of orthodontic brackets without enamel etching

Cited by 10 publications

References 26 publications

Variations in enamel damage after debonding of two different bracket base designs: An in vitro study

Variations in enamel damage after debonding of two different bracket base designs: An in vitro study

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Shear Strength of Brackets Bonded with Universal Adhesive Containing 10-MDP after 20,000 Thermal Cycles

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